#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
print("hello world")

import keyword
print(keyword.kwlist)

name = "xiong"
age = 111

print(id(name))    # 2216937547008
print(id(age))     # 140731486072912

name2 =name        # 2574532270208
name = "hello"
print(id(name))    # 2574532270208
print(id(name2))   # 2574532240640